We found one dictionary that defines the word upweighting:

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1. upweighting: Wiktionary

Opposite: downweighting, de-emphasizing, reducing ▸ Words similar to upweighting ▸ Usage examples for upweighting ▸ Idioms related to upweighting ▸ Wikipedia articles (New!) ▸ Words that often appear near upweighting ▸ Rhymes of upweighting ▸ Invented words related to upweighting